You are viewing all Organic Growers Supply products related to “seed starting.”
A premium high-test potting soil recommended for indoor growers, container gardening, soil-blocking, or slow-growing seedlings that will be in the greenhouse for six weeks or more. Made in New York.
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A light-textured potting soil with extra perlite, screened to ½". Recommended for the smallest flower and herb seeds. Transplant to a more nutrient-rich blend to grow out. Made in Maine.
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This professionally calibrated mix will give any peat-based potting mix a run for its money. This reliable mix will keep your plants going strong in their flats for at least 4 weeks.
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Dirtcraft Peat-Free Critical Mass Supersoil
low stock
Dirtcraft Peat-Free Soil -
Compost and Potting Soil
low stock
Ditch the bottled nutrients with this water-only mix that's supercharged for maximum yield in flowering plants! Recommended for all fruiting and flowering plants, cannabis, and heavy-feeding crops.
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Dirtcraft Peat-Free Levitation Seedling Mix
low stock
Dirtcraft Peat-Free Soil -
Compost and Potting Soil
low stock
Optimized for strong root growth, and charged with a fine-tuned organic fertilizer blend. Recommended for seed starting, transplants, paper-pot trays and rooting cuttings.
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An environmentally sound substitute for peat moss. Use in potting mixes or to add organic matter to your soil. Improves aeration, nutrient retention, and moisture-retention capacity.
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A great alternative to perlite in your growing medium—carbonaceous, renewable and less dusty to mix. Also used as a mulch for container plants. Parboiled to eliminate viable weed seeds.
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Recommended for cell-tray seedlings, but not for soil-blocking. Warms more quickly and drains better than Fort Vee, but might need additional fertilizing prior to transplanting.
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Widely used by growers who make soil blocks. Has good water retention and a long-lasting nutrient supply from the high proportion of compost in the mix. Highly recommended for slow-growing seedlings.
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Sick and tired of poor yields from your container-grown cannabis or hemp? Ahoy, matey, this flowering and fruiting mix is for you! Also great for tomatoes and other vegetables, flowers or houseplants.
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Great for filling their raised beds or large containers Coarser than potting mixes, and formulated as a complete soil for organic cultivation of woody plants, shrubs, herbs, vegetables and flowers.
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Vermont Compost Totes
expect 1-2 weeks for fulfillment
Vermont Compost Potting Mixes -
Compost and Potting Soil
expect 1-2 weeks for fulfillment
For the times when those little bags just won't cut it, Vermont Compost blends are available in 2 cubic yard totes, perfect for larger gardens and growing operations. Choose from a variety of blends.
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This solid brass head puts out a “superfine” (0.5 gal per minute) mist that is suitable for seed-starting or delicate plants of all kinds.
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These one-gallon plain round non-woven fabric pots provide great airflow and drainage. Fantastic for indoor growing, and can also be used outdoors.
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These 100-gallon plain round non-woven fabric pots provide great airflow and drainage for all your giant plants. Fantastic for indoor growing, and can also be used outdoors.
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These 20-gallon non-woven fabric pots have built-in handles, and provide great airflow and drainage. Fantastic for indoor growing, and can also be used outdoors.
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These three-gallon plain round non-woven fabric pots provide great airflow and drainage. Fantastic for indoor growing, and can also be used outdoors.
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These 45-gallon plain round non-woven fabric pots provide great airflow and drainage for all your giant plants. Fantastic for indoor growing, and can also be used outdoors.
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These 5-gallon non-woven fabric pots have built-in handles, and provide great airflow and drainage. Fantastic for indoor growing, and can also be used outdoors.
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Like our regular Fabric Pots, but with a Velcroed slit side to allow for easier transplanting without disturbing the root ball. With felt handles. By popular request from our walk-in customers.
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Sturdy clear plastic domes from the manufacturer of our heavy-duty plant trays. Will last for years with reasonable care. 3¼" tall.
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These 7"-high domes that fit neatly over a standard 1020 tray. Two dial-type vents on the top of the dome allow you to manage the humidity.
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Made of recycled cardboard fiber, these handy planters breathe much like clay pots. Reusable with care—one customer says he got ten years out of his before he had to order new ones.
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Like our standard 1020 trays, but with open mesh bottoms. Favored by many growers for soil block propagation, supporting plug flats, and hydroponic production. 2⅜" deep.
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10½ x 21 x 2¼" grey plastic trays, often called 1020 Trays. Use with a dome to hold in heat and moisture.
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10½ x 21 x 2¼" grey plastic trays, often called 1020 Trays. Good for windowsills because they have no drain holes. Use with a dome to hold in heat and moisture.
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Also known as Pro Trays. Made of lightweight black plastic with bottom drain holes. 50 round cells in a sheet, 1.88" wide, 2.31" deep, fits into standard 1020 Trays.
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Also known as Pro Trays. Made of lightweight black plastic with bottom drain holes. 72 round cells in a sheet, 1.50" wide, 2.31" deep, fits into standard 1020 Trays.
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Tired of cheap plastic six-packs that fade and crack? Then invest in these crush-proof break-proof melt-proof freeze-proof seedling containers made of rugged BPA-free FDA-approved silicone.
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Made in the U.S. from cow manure and a bit of recycled newsprint, nourishes the plant as it decomposes. Roots can grow right through the walls of the pot. 3" round, 3¼" tall
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Made in the U.S. from cow manure and a bit of recycled newsprint, nourishes the plant as it decomposes. Roots can grow right through the walls of the pot. 3" square, 3" tall.
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Made in the U.S. from cow manure and a bit of recycled newsprint, nourishes the plant as it decomposes. Roots can grow right through the walls of the pot. 4" square, 4⅜" tall.
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Made in the U.S. from cow manure and a bit of recycled newsprint, nourishes the plant as it decomposes. Roots can grow right through the walls of the pot. Six-packs of 3" squares, 3" tall.
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Everything a child or new grower needs to get started: soil, fertilizer, an EZ-Digger, seedling containers and plant labels, as well as growing instructions and seeds for a dozen easy crops.
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This lightweight metal box is just the right size for neatly filing our standard-sized seed packets. Perfectly portable. Comes with dividers, seed storage reference chart, and a handy handbook.
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Want to grow your own seedlings but don’t know where to start? This kit is for you! Contains potting soil, cell trays, domes, labels, and extra-thorough instructions to help you succeed.
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SUNPACK’s high-output full-spectrum lighting ensures your plants receive optimal conditions. Energy-efficient LEDs save loads of electricity and...
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For a head start on the growing season, you’ll need to provide supplemental indoor lighting to your seedlings. These light stands from SUNPACK are...
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SUNPACK’s high-output full-spectrum lighting ensures your plants receive optimal conditions. Energy-efficient LEDs save loads of electricity and...
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For a head start on the growing season, you’ll need to provide supplemental indoor lighting to your seedlings. These light stands from SUNPACK are...
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SUNPACK’s high-output full-spectrum lighting ensures your plants receive optimal conditions. Energy-efficient LEDs save loads of electricity and...
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If you already have a cart, shelf or some other structure to suspend grow lights from, this handy hanger gives you maximum height customization...
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A handy doodad that links two LED Strip Grow Lights end-to-end and in-line. For example, it could link two 24" lights to make a 48" light,...
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Provides extremely uniform precise temperature over its entire surface. Makes the difference between success and failure when starting crops of tropical ancestry. Controller sold separately.
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Provides extremely uniform precise temperature over its entire surface. Makes the difference between success and failure when starting crops of tropical ancestry. Controller sold separately.
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Controller thermostat to be used with Agritape heat mats. Each controller has a flexible 3' tube with a temperature-sensor bulb to insert into the potting soil. Heat mat sold separately
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A good heat mat makes the difference between success and complete failure when starting crops of tropical ancestry, including most Solanums...
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A good heat mat makes the difference between success and complete failure when starting crops of tropical ancestry, including most Solanums...
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A good heat mat makes the difference between success and complete failure when starting crops of tropical ancestry, including most Solanums...
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All the performance and safety features as SUNPACK’s standard heat mats, with the added benefits of more power, larger size, linkability, and...
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All the performance and safety features as SUNPACK’s standard heat mats, with the added benefits of more power, larger size, linkability, and...
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SUNPACK’s digital thermostatic device allows growers to select and maintain optimal temperatures (setting range: 68–108°) for germinating seeds or...
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Peat pots. Just the right size for tomatoes, brassicas and melons. Can be put directly in the ground without disturbing seedlings. 3" round, 3¼" tall. 18 fit in a standard 1020 Tray.
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Square peat pots can be packed more tightly than round ones. Can be put directly in the ground without disturbing seedlings. 3" square, 3⅛" tall. 18 fit in a standard 1020 Tray.
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Peat pots. Bigger pots for squashes and other late-season plants. Can be put directly in the ground without disturbing seedlings. 4½" round, 4" tall. 14 fit in a standard 1020 Tray.
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Makes 20 micro-blocks per stroke in a 3x4" area. Micro-blocks are easier to warm, speeding germination. Can be inserted into 2" soil blocks to continue seedling growth.
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Make 2" soil blocks ready to receive micro-blocks to continue seedling growth. Set of square plastic inserts can be snapped into Mini 4 or Multi 12 blockers.
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Makes four 2" soil blocks in one stroke. Using soil blocks allows for easy transplanting and eliminates root spiraling. Made in England by Ladbrooke Ltd.
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Makes five 1½" soil blocks in one stroke. Using soil blocks allows for easy transplanting and eliminates root spiraling. Made in England by Ladbrooke Ltd.
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Thick flexible plastic tray with a rim that is sturdy and easy to handle. We’ve never seen a sturdier tray! Works with standard 1020 trays. No drain holes.
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All the great features of the full-sized winstrip trays, but sized for smaller plantings. Each tray has 10 cells, with cell size of 1.6" wide x 2.72" deep. 5 will fit in one 1020 tray.
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All the great features of the full-sized winstrip trays, but sized for smaller plantings. Each tray has six 1.3" wide x 2.3" deep cells. 12 will fit in one 1020 tray.
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All the great features of the full-sized winstrip trays, but sized for smaller plantings. Each tray has 16 cells, with cell size of 1" wide x 1.9" deep. 8 will fit in one 1020 tray.
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These trays offer the best features of both plug flats and soil blockers, and then some! Extremely durable recycled plastic is food grade, BPA-free and UV-resistant. Made in the USA.
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These trays offer the best features of both plug flats and soil blockers, and then some! Extremely durable recycled plastic is food grade, BPA-free and UV-resistant. Made in the USA.
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These trays offer the best features of both plug flats and soil blockers, and then some! Extremely durable recycled plastic is food grade, BPA-free and UV-resistant. Made in the USA.
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Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
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Strong injection-molded dishwasher-safe trays with drain holes for efficient production of high-quality microgreens, wheatgrass or specialty...
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If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
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Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
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Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
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Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
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Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
read more
Strong injection-molded dishwasher-safe trays with drain holes for efficient production of high-quality microgreens, wheatgrass or specialty...
read more
If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
read more
Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
read more
Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
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We’ve never seen mesh bottom trays as sturdy or as sleek as SUNPACK makes them. These are 2.3 times thicker than our old mesh trays. They provide...
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Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
read more
Strong injection-molded dishwasher-safe trays with drain holes for efficient production of high-quality microgreens, wheatgrass or specialty...
read more
If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
read more
Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
read more
Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
read more
When they go low, we go high! These 7" tall domes offer clear high-level utility and versatility for growers at any scale, accommodating vigorous...
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Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
read more
Strong injection-molded dishwasher-safe trays with drain holes for efficient production of high-quality microgreens, wheatgrass or specialty...
read more
If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
read more
Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
read more
Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
read more
Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
read more
Strong injection-molded dishwasher-safe trays with drain holes for efficient production of high-quality microgreens, wheatgrass or specialty...
read more
If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
read more
Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
read more
Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
read more
If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
read more
Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
read more
Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
read more
Strong injection-molded dishwasher-safe pots have efficient drainage holes, are easy to fill with potting mix, and are easy to extract seedlings...
read more
Strong injection-molded dishwasher-safe trays with drain holes for efficient production of high-quality microgreens, wheatgrass or specialty...
read more
If you’re wondering what “mega” really means here, we’re talking about a tray that can support 120 lb. Imagine resting a 1020 tray across...
read more
Sturdy shallow-rimmed injection-molded bottom trays with 1" of usable depth are a must-have for growing microgreens, and great support for pots...
read more
Same strong mesh as the Deep Heavy-Duty Mesh Trays, but with a shallow 1" profile (¾" usable depth). Great for growing full flats of microgreens...
read more